@jascha
I have very intense #ADHD and I found one way of doing things that works, for me at least.
I started studying martial arts as a way of channeling my impulsivity, and found that when I was sparring, I had to maintain focus, as if I got distracted, then Bam! I was on the floor. :D
When I started to apply this to kata, and to solo weapon forms, I found my self slipping into the trance states known as "Flow states". Very chewy. Very zen.
But it was only when I treid fire juggling that it clicked for me.
Finding that flow state through physical exercise, but having to restrain the impulsivity as there's "something on fire!" moving around you, and finding the freedom to jam/improvise in terms of movement patterns and dance.
It's a very peaceful place to be in. :D
The combination of need for control, closeness to danger, and freedom to be, works really well for me.
Try starting with juggling. :D